How to svg blob generator: create organic shapes free online
- Step 1Set your complexity and randomness — Complexity sets the number of control points (3 = simple triangle-ish blob, 8–10 = rich organic form). Randomness controls how far each point deviates from a regular polygon — high randomness creates wild shapes, low randomness creates near-circles.
- Step 2Adjust colour and fill — Choose a solid fill colour or a gradient (two colours, angle adjustable). The preview updates in real time. For background blobs, consider 10–20% opacity so the blob is visible but doesn't dominate the layout.
- Step 3Export for your project — Click Export SVG to download the blob as a file. Click Copy CSS to get the clip-path: path() value for use in CSS. Click Copy SVG to get the inline SVG string for direct paste into HTML.
Frequently asked questions
How are blob shapes generated mathematically?+
The generator places N control points evenly around a circle, then randomly offsets each point's radial distance. Cubic Bezier curves connect the points with smooth tangents derived from the adjacent control points. This technique, popularized by the blobmaker.app approach, guarantees a closed, smooth shape with no sharp corners.
Can I animate a blob shape?+
Yes. Generate two or three blob shapes with the same complexity but different seeds. Use CSS keyframe animations or JavaScript (GSAP MorphSVG, Flubber.js) to morph between the path data. The morphing works smoothly because all blobs from the same complexity setting have the same number of path commands.
How do I use a blob as a CSS background for a section?+
Export the blob as an SVG file, upload it to your server, and use it as a CSS background-image: background-image: url('/blob.svg'); background-size: cover; background-position: center. For animated backgrounds, use the SVG as an absolutely positioned element behind the content div with pointer-events: none.
Can I use the blob shape as a mask to clip an image?+
Yes. Export the blob as a CSS clip-path: path() value. Apply it to an img element: clip-path: path('M...'). The image will be clipped to the organic blob shape. For maximum browser compatibility, use the polygon() approximation (lower point count) instead of path() for the clip.
Privacy first
Every JAD SVG tool runs entirely in your browser using the DOM API and Canvas. Your SVG files never leave your device — verified by zero outbound network requests during processing.